Calculating machine



June 4, 1946. c. M. l -RlDEN ET AL 2,401,473

CALCULATING MACHINE Filed Oct. 29, 1943 s Sheets-Sheft. 1

INVENTORS CA RL M- FRIDEH AQTHOHY B. NACHADO L2 am? CALCULATING MACHINE Filed Oct. 29, 1945 e Sheets-Sheet 2 nve CARL H. FRIDEN IIIIIII/I/II/I/IIlI/II/I/I/I/IIII/ (Ittorneg 3 ntor ANTHONY B- HACHADO June 1946'v c. M. FRIDEN ET AL CALCULATING MACHINE 6 Sheets-Sheet 5 m mNA mEH 3w R F .a Y a L mm A Filed Oct. 29.

1 I l I ll (Ittomeg 6 Sheets-Sheet 4 C. M. FRIDEN ,gALcu mING MACHINE June 4, 1946.

Filed 001". 29.: 1945 June 4, 1946- C. M. FRIDENI ET AL CALCULATING MACHINE Filed Oct. 29, 1943 6 Sheets-Sheet 5 ZSnventots CARL. M. FRIDEH ANTHONY B. HACHADO (Ittorneg June 4, 1946.

CM. FRIDEN ET AL 2,401,473

CALCULATING MACHINE Filed Oct. 29, 1943 e Shge ts-Sheet e I76 7 us I611 m ys/rro/zs CARL M. FRIDEN.

ANTHONY B. HACHADO. BY

Patented June 4, 1946 CALCULATING MACHINE Carl M. Friden, Pleasanton, and Anthony B. Machado, San Leandro, Calif., assignors to Frlden Calculating Machine 00., Inc., a corporation of California Original application November 11, 1942, Serial No.

Divided and this application October 29, 1943, Serial No. 508,220

4 Claims. 1

This invention relates to calculating machines and is concerned more particularly with the provision of improved means for controlling calculating operations.

This application is a division of our co-pending application Serial No. 465,112, filed November 11, 1942.

It is an objectv of the invention to provide improved control means for the cyclic drive of a calculating machine whereby optional single cycle or plural cycle operations can be obtained under control of the same keys.

Other objects and advantages of the invention will be apparent from th following descrip tion of a preferred embodiment thereof, as illustrated in the accompanying drawings, in which:

Figure 1 is a fragmentary plan view of a calculating machine embodying the invention.

Figure 2 is a vertical longitudinal sectional view of the machine taken as indicated by the line 2-2 in Figure 1.

Figure 3 is a continuation of the section of Figure 2 at the front end of the machine.

Figure 4 is a, fragmentary plan view of the calculatin machine with certain parts shown in section and others omitted to show certain details of the construction more clearly.

Figure 5 is a vertical longitudinal section to show the drive and drive control means of the calculating machine, the view being taken as indicated by the line 55 in Figure 1.

Figure 6 is a fragmentary section showing certain related parts of the keyboard clear or release mechanism and the keyboard lock mechanism. The view is indicated by the line 6-6 in Figure 4.

Figure 7 is a diagrammatic view of the parts with the add lever in active position.

Figure 8 is a diagrammatic view similar to Figure 7 showing the parts as positioned at the end of an operation with the stopping function being performed.

Figure 9 is a view similar to Figure 7 showing the parts as positioned with'the clutch engaged.

Figure 10 is a diagrammatic view similar to Figure '7 showing the parts conditioned for plural cycle operation with the clutch engaged at driving. 7

The invention is illustrated in connection with the type of calculating machine disclosed in the patent to Carl M. Friden, No. 2,229,889, dated January 28, 1941.

Referring to Figures 1 and 2, the machine includes a body l0 comprisin base II and casing l2 suitably secured thereon and in which the z. actuating, selecting and control mechanisms are mounted. Register carriage I3 is mounted for endwise shifting movement transversely of body l0 and carries numeral wheels or dials l4 and I5 of th accumulator and revolutions counter, respectively. Carriage I3 can be shifted by power in either direction by manipulation of respective shift keys l6 and ll through suitable shift mechanism, or can be tabulated to a desired selected position by depression of tabulation control key l8 after setting of one of the selected ordinal tabulator keys l9.

Values are entered into the machine by depression of numeral keys 2| of the usual keyboard in the various ordinal rows thereof, keys 2| being releasable individually by depression of ordinal clear keys 22 or collectively by depression of keyboard clear key 23. Values introduced into the machine may be registered additively or subtractively on accumulator numeral wheels- M by depression of plus key 24 or minus key 25, respectively. The number of registrations or its complement can be entered in counter numeral wheel [5 by proper setting of control lever 21. If desired, add lever 28 may be set to cause clearing of the keyboard after a single registration is entered. Numeral keys 2 l may be locked in their adjusted position byappropriate setting of keyboard lock lever 29. a

Values registeredin numeral'wheels l4 and I5 can be erased by manual operation of resetting handles 3| and 32 respectively, or by power through depression of return clear key 33.

The machine is adapted-to perform automatic division by means of a conventional mechanism including division starting control lever 34. Division stop lever 35 is provided for terminating a division operation when the desired quotient figure is registered.

Within the casing l2, the frame includes left and right side plates 36 and 31 (FigsQ2 and 4) which are suitably mounted on base ll and are inter-connected by various cross frame brackets including one or more tie rods 38 and transverse brackets 39, 40, 4| and 42 for supporting various mechanisms including the selecting and actuating mechanisms.

Values to be introduced into accumulator-numeral wheels I4 are selected by means of a plurality of similar orders of conventional selecting mechanism including endwise movable slides 43, 43a (Figs. 2 and 3) associated with numeral keys 2| of each bank, keys 2i are latched in depressed position by a spring-urged latching slide 44 for each bank of keys. Keys 2! shift slides 43, 43a

which position ten-tooth gears 40, a with respect to the stepped teeth 41, "a of the associated actuating cylinder ll so that selected increments of movement are transmitted to a square shaft 02 on which gears 4', a are slidably and non-rotatably mounted in the usual fm. Each shaft." also carries a spool it g respective plus and minus gears at its ends for selective engagement with the ten-tooth gear N at the lower end oi vertical shaft I! on which numeral wheel or dial It is mounted.

The positioning of the plus-minus gears is contrailed by means including a strap or gate ll (Fig. 2) suitably mounted ior rocking movement by a plurality of upright arms I! carried by shaft Shait l is connected by arm 01a (Figs. 4 and to a plus-minus slide 00 controlled by the plus and minus keys 24 and 28 in the usual iashion.

Clutch The drive mechanism which is controlled by any of the operation keys referred to includes a motor I (Fig. 2) having a drive shaft 02. A pinion "a (Fig. 5) through intermediate gear it drives gear 04 which is lournalled on shaft 80. A clutch is provided for connecting the drive gear 04 to shaft 80 which, as shown in Figure 4, extends transversely of the machine and through bevel gears 00' drives the actuating shaits 01 on which the actuating cylinders are mounted. Drive gear 80 (Fig. 5) carries a ratchet 00 which is disposed inside the driven portion of the clutch including disc II and ring I! which rotates in unison with shait I. A clutch pawl It is pivoted at one end at It on the driven member oi the clutch and has spring I! attached to its other end to urge it toward the ratchet 00 so that its tooth II will engage with the teeth oi the ratchet. At its free end the pawl 13 is provided with a shoulder is for engagement by the nose of a clutch control lever pivoted at 0|. The lever has a pin 82 by means at which it is operated as later described. A spring I urges the lever counterelockwise (Fig. 5) on its Divot II. ltotatiion oi clutch control lever II clockwise irom the position shown in Figure 5 serves to engage the clutch by releasing pawl II, which then moves under the urgency oi spring 10 to engage its tooth 11 with one oi the teeth of ratchet 00, thus transmitting rotation from gear 04 to shait 00. During rotation of the shaft 08 the control lever I0 is maintained rocked clockwise to its clutch en agin position for substantially a full ovcle (irrespective of release oi the pin as) by the engagement oi roller 04 on lever is with the periphery of ring 12. If lever 10 is released roller 84 seats in depression si in the ring 12 which is of suilicient extent to allow clutch control lever 10 to rock inwardly as the clutch driven ring II approaches full cycle position so that the nose of clutch control lever I! can engage shoulder II on the clutch pawl 13. In this manner release a! lever It causes disengagement of the clutch.

when the clutch is disenga ed by control lever 10 (Fig. 'l) shaft ll overruns its iull-cycle position under the momentum of the parts and the pawl is is swung outwardly beyond its normal disengaged position shown in Figure 7 to the position shown in Figure 8 by reason of the fact that while the shoulder is is held against clockwise movement by the nose oi lever II, the pivot ll of pawl 18 rotates clockwise when the rinfl I! on which it is mounted overruns full-cycle position. As a result the pawl 13 rotates counterclockwise relative to its pivot ll.

In moving beyond its normal disengaged position the pawl It engages a lever II which acts as a resilient stop. The lever 88 (Fig. 5) is pivoted at '1 and has a strong tension spring 00 attached to its outer arm. A stop pin 80 restrains the lever from engaging the pawl It except when the pawl is swung outwardhr in stopping as shown in Figure 8.

The strength oi the spring II is preierably such that in the stopping operation the lever .0 will be rocked from the dotted to the full line position in Figure 8. When clockwise rotation of shaft 00 and associated parts has been arrested, the lever 08 becomes effective under the influence oi its spring ll to aid the centralizing roller 04 under the influence of the spring ll to seat in the depression I! of the ring 12 and return the shait It to lull-cycle position.

To control the clutch and the motor circuit, plus and minus keys 24 and 25 (Figs. 4 and 5) have associated therewith a slide 9| mounted for endwlse sliding movement on the frame plate 82 (Fig. 4). This slide has a pair oi cam surfaces 03 for engagement by respective pins 00 carried by the keys. Upon depression of one oi keys 24 or 25, the slide OI will be moved to the right as viewed in Figure 5. The slide it is provided with a vertical slot engaging a pin 00, carried at the upper end oi a lever 91, pivoted at so on side plate 31. Lever 01 has an operating connection with a second lever 99, pivotally supported at Ni, and having an insulated pin I02 ior closing contacts I03 oi the motor circuit. The levers s1 and are adapted to be operated by mechanism not shown whereby other control keys of the mechanism may cause engagement of the clutch and closure oi the motor circuit.

Cyclic control The pin 00 (Fig. '7) provides the pivotal mounting for a single cycle or a uni-cyclic control lever I06 (Figs. 5 and 'l) which is urged in a counterclockwise direction by spring I01 to engage its notch or seat I" with pin 82 of clutch control lever It, Adjacent to seat I08 the lever I00 is provided with a cam surface I00 ior engagement with a pin I II on the frame plate ll. Thus when lever 01 is rocked clockwise it moves lever I pivoted thereon to the right. In the first part of its movement the lever I06 rocks clutch control lever II to its clutch engaging position. However, as the lever I06 moves to the right it is rocked clockwise by the engagement of cam suriace I00 with pin III. As shown in Figure 9 the lever II has released the pawl II and the clutch is engaged and in addition in the last part of the movement oi the lever I00 to the right and downwardly it has released the pin .2 so that the lever II is free to disengage the clutch even though the plus or minus keys are held down at the end of one cycle as shown in Figure 8. When the plus or minus key is released, the parts return to the positions shown in Figure 'l. The plus or minus key may be released either in mid-cycle or after the cycle has been concluded. In either event the cutch control lever 18 disengages the clutch and, upon release of the key, the lever 01 withdraws the lever III! to its original position where it reengages the pin 02.

To enable the operator to operate the machine continuously for a plurality of cycles means are provided, which when set, place the clutch lever 10 under the sole control of the plus and minus keys. Pivot pin 96 also provides a pivotal mounting for a bellcrank lever H0 which has a seat I" at its rearward end for engagement with pin 01 in the position shown in Figure 5 to which position the lever H6 is normally urged by a spring 6'. In single cycle operation the lever H6 is elevated by means presently described to the position shown in Figure 7 free of the pin 82 and upon movement to the right will be maintained free of the pin by an ear I I8 (Fig. 9) on plate 31 engaging the bevelled end of the bellcrank lever H6. The forward depending end of bellcrank H6 is pivotaliy connected at II8'=to a link I2I which extends forwardly of the machine and is slotted to engage a pin I22 on the add lever 28 which is pivoted at I23 on the side plate 31. Upon movement of the add lever 28 from the dotted line position (Fig. 7) to the full line position link I2I is moved rearwardly of the machine to rock the bellcrank lever II6 counterclockwise on its pivot 86 to disengage its seat II1 from the pin 82. With the add lever 28 in the down position the uni-cycle lever I86 is left in control.

With the lever 28 in the up position, as shown in Figures 5 and 10, the seat II1 remains engaged with the pin 82. Therefore, when the operator depresses either the plus or minus key the lever 91 moves the lever II6 to the right from the Figure 5 position to the Figure 10 position, so that the clutch lever 18 is held out as long as the key is held depressed. When the key is released the parts return to the Figure 5 position where the clutch lever 19 engages the pawl 13 to disengage the clutch. Thus, with the lever 28 set for plural cycle operation the clutch remains engaged as long as the plus or minus key is held down,

Keyboard clearwardly-turned finger I38 (Fig. 3) formed thereon. Disposed behind the fingers I38 and extending transversely of the keyboard (Fig. 4) is the flange I3I of a bail I32-pivotally mounted as at I33 (Fig. 3). When the bail I32 is rocked forwardly it draws all the slides 44 forwardly, thus releasing all depressed keys 2| in the keyboard.

The keyboard can be locked by a gate I48 (Fig 4) which extends transversely of the keyboard in front of the fingers I38. This gate is pivotally mounted as at I4I (Fig. 3) so that it can be swung up and down. In the down position (Fig. 3) the gate I48 is disposed below the fingers I38 so that any or all of the slides 44 may be moved forwardly to release depressed keys when the gate is in this position. The bellcrank lever 28 (Figs. 1 and 6) is pivotally mounted in the frame so that it may be adjusted to up or down position. A pin I45 projects to the left from the lower end of the lever 29 into the path of a pin I46 which projects upwardly from the ate I48.

When lever 29 is down( Fig. 5) the gate I48 is down and the keyboard may be cleared. The gate I48 has a downwardly-extending arm I48 (Figs. 4 and 6) at the right end to which a spring I43 is attached. This spring urges the gate toward the up position and when the lever 28 is moved to its up position the gate I48 is resiliently held in the up position (Fig. 6) where it opposes forward movement of the fingers I38 and thus locks the keyboard.

When the gate I48 is down, depressed keys I2 may be released by depressing ordinal clear keys 22 or keyboard clear key 23. Key 23 (Fig. 5) has a laterally projecting pin I58 which overlies a cam I5I (Fig. 6) formed on the bail I32.

Depression of clear key 23 rocks bail I32 forwardly.

Whenthe add lever 28 is set in the .down position (Fig. 7) to raise the tail, of.lever II6v off the pin 82 and leavethe lever -l86 free. to'control the clutch for single cycle operation, the lever 28 also conditions other mechanism which operates to clear the keyboard at the end of the single cycle. The lever 86 (Fig. 5,) has, a downwardly and forwardly extending arm I68 to which is pivotally connected at I6I a forwardly extending link I62. A spring I63 lifts the front end of link I62 which has an up and a down position controlled by the lever 28..

A pin I65 at the. foot of lever 28engagesadepression I66 in the upper edge of the link-I62 when the lever 28 is in the up position (Fig. 5).

When the lever 28 is moved to the down position (Fig. 7) the pin I65 is swung upwardly in an arc, permitting the spring I63 to lift the front end of link I62.

Lifting the link I62 unlocks the keyboard if it is locked. A laterally extending pin I18 in the front end of link I62 underlies a cam edge I1I on arm I48 of gate I48. If the gate is in locking position (Fig. 6) it will be swung down when link I62 is lifted (Fig. 7).

Lifting the link I62 engages a shoulder I15 thereon with a square pin I16 projecting laterally from a leg I11 on the bail I32. When either the plus or minus key is depressed the clutch makes one revolution and stops. When it comes to a stop the lever 86 is rocked, as shown in Figure 8, drawing link I62 rearwardly. The rearward movement of link I62, through the engage ment of shoulder I15 with square pin I16, causes the bail I32 to be rocked forwardly to clear the keyboard.

We claim:

1. In a calculating machine, having a register, actuating means therefor and cyclic drive means for said actuating means including a clutch; a clutch control element movable from clutch disengaging to a clutch engaging position, means for controlling said clutch control element including a pair of members operatively related thereto and simultaneously movable to cause movement of said element from a clutch disengaging to a clutch engaging position, and automatically operable means for causing one of said members to be disengaged from said clutch controlling element upon movement of said element to clutch engaging position.

2. In a calculating machine having a register, actuating means therefor and cyclically operable drive means for said actuating means; operation control means for said cyclically operable drive means including a member movable to initiate cyclic operation of said. drive means, a control key, and a connection between said control key and said member including a pair of elements operatively related to said member to effect movement thereof, means for causing one of said members to move automatically out of oper-- coupled to said member in the clutch disengaging position thereof, and means including a tiled element for uncoupling said lever from said member after said member has been moved to clutch engaginl position to permit said memher to return to clutch disengaging position. said means for moving said clutch control member including means adapted to be operatively conditioned by a settable means (or preventing return of said member to clutch disengaging position until return 0! said moving means to original position.

4. In a calculating machine havng a register, actuating means therefor and cyclically operable drive means for said actuating means: said drive means including a clutch, a clutch control member normally urged toward clutch disengaging position, an operation control key, means operable upon depression of said key for moving said control member to clutch engaging positioning, said moving means including two levers adapted to engage said member, means for invariably disengaging one of said levers from said member after said member has been moved to clutch engaging position, and means selectively adjustable to permit or prevent engagement of said other lever with said member.

CARL M. FRHJEN. ANTHONY B. MACHADO. 

